DWT Holding Tank+ | Holding Tank Cleaner and Treatment

Item number: 7424930666632
£19.75 £16.46 (excl. VAT)

10 in stock

  • Organic product for grey water tank maintenance
  • Fights odors and blockages
  • Specially developed to break down organic sludge in the tank
  • Contents: 1 pack contains 150 grams

DWT Holding Tank+ | Holding Tank Maintenance | Plastic-Free!

Prevents odors and blockages in your holding tank.

DWT Holding Tank + is a highly effective, organic product in completely plastic-free packaging. It contains non-pathogenic bacteria and microorganisms that break down organic matter in the holding tank—without releasing unpleasant odors. This helps prevent foul-smelling wastewater.

This pack contains 150 grams, enough for approximately 10 treatments of 15 grams each (1 tablespoon). The packaging is fully compostable and can be disposed of with organic waste.

This product is 100% organic and carries no hazard label. Naturally, keep out of reach of children.

How do I use this holding tank maintenance product?

It’s easy to use. Simply check the size of your holding tank and adjust the dosage accordingly. For the correct dosage, please refer to the table under the “User Guide” tab.

How do I use Holding Tank + Holding Tank Maintenance?

The dosage is as follows:

  • Holding tanks up to 50 liters: use 15 grams (1 tablespoon) as a starting dose.
  • Holding tanks from 50 to 150 liters: use 30 grams (2 tablespoons) as a starting dose.
  • Holding tanks over 150 liters: use 45 grams (3 tablespoons) as a starting dose.

Repeat after each emptying or every 5 days.

Does Holding Tank + have a hazard label?

No, this product is completely organic and contains no chemicals. Therefore, it is free of hazard labels. Of course, it’s always wise to keep the product out of reach of children.

How much do I need for my holding tank?
That depends on the size of your holding tank. For the correct dosage, please refer to the table under the “User Guide” tab.

Customers rate us with a

9 out of 10

Adrian Harnet

18/10/2026
I bought 2 bottles of Bio-Recup LQD – Rainwater Tank Treatment, one to use immediately and the other as a spare for future use if required. The order and delivery were processed quickly so that I could treat the Rainwater Tank within a few days. It very quickly had the desired effect of stopping the odour from the growth of algae and bacteria. I strongly recommend it.
Source: Google

Andrew Nash

14/10/2026
Great products at very reasonable prices.
Source: Google

Susan Downie

13/10/2026
Only been using it for a month but made a great difference already. Good product.
Source: Google

Andrew Duncan

09/09/2026
Can’t fault product description, ease of ordering and delivery
Source: Google

alex bruce

26/08/2026
It works – your bathroom waste turns into grey water – dosing is simple to calculate even when you have extra people staying for a while. No smells and reasonably priced. Revised packaging is not great but apparently it helps to save the planet
Source: Google

P M

05/08/2026
Great product. Arrived very quickly. Thank you.
Source: Google

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